Live 4 The LORD

Yes, the Holy Spirit departs from a person who commits a mortal sin. Mortal sin results in the loss of charity and the privation of sanctifying grace, which is the state of grace [^1].

Here's a breakdown:

*   **Mortal Sin:** A mortal sin is a grave offense against God that destroys charity in the heart of man [^4] [^6] [^7]. It involves grave matter, full knowledge, and deliberate consent [^5] [^7].

*   **Loss of Grace:** Mortal sin deprives a person of sanctifying grace [^1] [^7]. Sanctifying grace is a supernatural gift of God that makes us holy and pleasing to Him.

*   **The Holy Spirit and Grace:** The Holy Spirit is intimately connected with sanctifying grace. When a person is in a state of grace, the Holy Spirit dwells within them.

*   **Departure of the Holy Spirit:** Since mortal sin deprives a person of sanctifying grace, it follows that the Holy Spirit departs when a mortal sin is committed.

*   **Blasphemy against the Holy Spirit:** Blasphemy against the Holy Spirit is unforgivable because it represents a radical refusal to accept God's forgiveness and the salvation offered through the Holy Spirit [^2] [^3]. It is a rejection of repentance and conversion, which are essential for receiving God's mercy [^2]. Thomas Aquinas explains that this sin is unforgivable because it excludes the elements through which forgiveness takes place [^2].

Therefore, committing a mortal sin causes a separation from God and the loss of the Holy Spirit. However, God's mercy is always available, and through repentance and the Sacrament of Reconciliation, one can be restored to a state of grace and the Holy Spirit can return.

[^1] [CCC 1861](https://www.magisterium.com/docs/0583c069-d4bf-42dd-97de-c19f0b80150f/ref/1861)

[^2] [A Catechism of Christian Doctrine (The Baltimore Catechism No. 3) 280](https://www.magisterium.com/docs/8b7bf85b-c327-43eb-8c2c-85f0272f6ae6/ref/280)

[^3] [CCC 1856](https://www.magisterium.com/docs/0583c069-d4bf-42dd-97de-c19f0b80150f/ref/1856)

[^4] [Compendium of the CCC 395](https://www.magisterium.com/docs/c6c4d3fe-2afe-4d7d-91b6-672dac04569c/ref/395)

[^5] [The Mystery of the Eucharist in the Life of the Church 47](https://www.magisterium.com/docs/da25a3b7-f234-4f1d-bc5c-128c330b936e/ref/47)

[^6] [Dominum et vivificantem 46](https://www.magisterium.com/docs/0e8e9822-2a0f-4e81-8d2f-4e08b5dc33ae/ref/46)

[^7] [CCC 1864](https://www.magisterium.com/docs/0583c069-d4bf-42dd-97de-c19f0b80150f/ref/1864)